Traction Control Needed...
Maybe it would work, but wouldn't it be a bad idea? Make it handle weird, maybe defeat the purpose of the width? I don't want it to look like I'm running sport bike rear tires on the back, because the wheels are so narrow they pinch the tires into a round shape! :D
No, and it won't look like a sportbike tire either. they look like that before you even put them on. By the way, you know there is no difference between a sportbike tire and any other streetbike tire, touring etc, right? Sportbike tires just tend to be wider however Harley has followed suit and in some cases gone even wider, 240's etc in factory trim.
It's more critical in the front but you aren't looking for huge rubber up front. To give you another idea MMT front runners are 7.50 tires and go on "approved" 3.5" wheels. Even then, you're putting stickies on the rear for a drag application. Handling isn't something we're talking about and your car unless modified/upgraded handles like...well a stock abody..lol.
I run 225's on a 8.5" wheel on my daily and it still have enough sidewall you can they then on their side gently without scuffing the wheel. In contrast my front runners on my dart are on 3.5's or 4" wheels with 12.50's out back on 11.25 wheels. I run 25lbs on street in the rear, 35 to 40 up front on my dart.
I have the same rear diff as you. It was a good choice. IMO the best choice.
As mentoned above, I'd recommend using offset hangers in the rear. If you are deadest on using those factory 14's, which I think you are crazy for..have them widened to the ideal width. Once you run offset shackles you can run a 10.5 section width tire.
